Mutual inforamtion loss normaliser 1d & 2d redundant?

[qiuhuaqi]

This step computing the joint distribution in MI pairwise loss: https://github.com/airlab-unibas/airlab/blob/80c9d487c012892c395d63c6d937a67303c321d1/airlab/loss/pairwise.py#L381

The marginal distributions are already normalised by self._normalizer_1d in: https://github.com/airlab-unibas/airlab/blob/80c9d487c012892c395d63c6d937a67303c321d1/airlab/loss/pairwise.py#L339

I might be mistaken. But doesn't the joint distribution no longer need normalisation (self._normalizer_2d) as its the outer product of the normalised marginal distributions?